new: dev: make compose sourcable for eventual tests !minor

Signed-off-by: Valentin Lab <valentin.lab@kalysto.org>

bin/compose

@@ -9,6 +9,7 @@
 ##    - no shell libs
 ##
 
+[[ "${BASH_SOURCE[0]}" != "${0}" ]] && SOURCED=true
 
 ANSI_ESC=$'\e['
 
@@ -457,6 +458,9 @@ run() {
 }
 
 
+[ "$SOURCED" ] && return 0
+
+
 ##
 ## Code
 ##